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RWD62U Controller
Function
Application
Item Number 129-410, Rev. 010
The RWD62U is a three-input, two-output device used to control temperature, humidity,
air pressure, fluid pressure, air/fluid velocity, and air quality in commercial and industrial
facilities.
The RWD62U is used for comfort control in HVAC systems. Two analog outputs with
0 to 10 Vdc voltage are provided for either two-stage heating or cooling, or heating and
cooling. The main analog input (X1) can be set as °F, °C, % or none specified (-----).
The default is °F.
The second analog input (X2) can be used for the following applications:
•
PI Limiter function (absolute and relative limit)
•
Remote setpoint function
•
Setpoint compensation
•
Winter/summer mode changeover (analog or digital input) (reversal of
heating/cooling output)
•
Cascade control function
•
Maximum priority for cooling/dehumidifying
A separate digital input is provided for day/night mode changeover.
The RWD62U controller is intended for either DIN rail mounting in a switchboard or
screw mounting with a protective enclosure.
Desired output configuration and auxiliary function must be entered for initial set-up.
See Service (PS) Mode Screen Sequence.
Installation and
Commissioning Guide
Document No. 129-410
October 1, 2004
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Summary of Contents for Siemens RWD62U
- Page 1 Application The RWD62U is used for comfort control in HVAC systems. Two analog outputs with 0 to 10 Vdc voltage are provided for either two-stage heating or cooling, or heating and cooling. The main analog input (X1) can be set as °F, °C, % or none specified (-----).
- Page 2 Document Number 129-410 RWD62U Controller Installation and Commissioning Guide October 1, 2004 Table 1. Application Numbers. Main Loop H = Heating C = Cooling (First digit = Main control loop Second digit = Auxiliary SP SP control loop) Auxiliary Loop #1 ×...
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Page 3: Main Screen
RWD62U Controller Installation and Commissioning Guide Document Number 129-410 October 1, 2004 Display Explanation Description Symbol Setting Range Symbol Description Setting Range Main Screen Adjustable setting screen TOOL PC communication port being used Application Numbers 10 through 59 (Not OUT RANGE... - Page 4 Document Number 129-410 RWD62U Controller Installation and Commissioning Guide October 1, 2004 Display Explanation, Continued Description Symbol Setting Range Symbol Description Setting Range PS4 – Main Control Loop Set-up 0 to 100% Integral action time for 0 to 4,096 seconds...
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Page 5: Operating Modes
RWD62U Controller Installation and Commissioning Guide Document Number 129-410 October 1, 2004 Table 2. PS 3 Auxiliary Function Parameter Set-up. Auxiliary Number: Parameter Description COMP WIN/SUM WIN/SUM Dead zone or offset (refer to the above explanation) Value to start Limiter cooling... -
Page 6: Main Display
Document Number 129-410 RWD62U Controller Installation and Commissioning Guide October 1, 2004 Main Display The main display shows: • Y1 and Y2 outputs in Volts dc. (0 to 10V will be display as 0, 1, 2 through 10) • Whether day or night setpoint is selected ( = day, = night). - Page 7 RWD62U Controller Installation and Commissioning Guide Document Number 129-410 October 1, 2004 • Press both buttons + ▲ and − ▼ and hold for five seconds to enter the Service Service (PS) Mode Screen Sequence Mode. • Press +▲ for viewing the next page or to increase value.
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Page 8: Wiring Terminals
Document Number 129-410 RWD62U Controller Installation and Commissioning Guide October 1, 2004 G, G0 24 Vac supply Wiring Terminals (SELV 24 Vac power supply) Ground (G0) for signal inputs D1 M X1 M X2 M Tool and universal inputs Signal input (main input:... -
Page 9: Installation
Wall-mounted with two screws. (Minimum length of the screws should be 2.75 inches (70 mm) (φ 3.2 mm). Front-mounted using standard elements: • One DIN rail 5.90 inches (150 mm) long for RWD62U • Two hexagonal placeholders 1.96 inches (50 mm) • Washers •... - Page 10 . Windows is a registered trademark of Microsoft Corporation. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2004 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc.